5.Whic Aid used for the classification of plant and animals? 6. In a wet preservation which chemical is used?
Answers
Humans feel the need to classify natural entities and the viruses are no exception. As in other biological systems, virus classification is an approximate and imperfect exercise. Like any other type of classification, it is a totally artificial and human-driven activity without any natural base. However, science requires workable descriptions of living systems and their constituent parts, and, when achieved properly, classifications are extremely useful for showing similar characteristics and properties across populations. Unfortunately for virus taxonomy no fossil record exists and so evolutionary relationships are very speculative, meaning that only a logical and precise virus classification can provide indications of the evolution of viruses. Appropriately chosen classification criteria are also informative in the case of newly discovered viruses. In theory, nomenclature and classification are totally independent, but for viruses both issues are often considered at the same time. As a result, taxonomic names for the viruses have always been the subject of passionate discussions and the taxonomic status of viruses is a sensitive and critical issue.